Revision D: • MSZ-GA•NA and MSY-GA•NA have been added. SPLIT-TYPE AIR CONDITIONERS Please void OB450 REVISED EDITION-C. INDOOR UNIT No. OB450 SERVICE MANUAL REVISED EDITION-D Models MSZ-A09NA, MSZ-A12NA, MSZ-A15NA, MSZ-A17NA, MSZ-A24NA, MSY-A15NA, MSY-A17NA, MSY-A24NA, MSZ-GA24NA MSY-GA24NA 1 1 1 1 1 1 1 1 Outdoor unit service manual MUZ-A·NA, GA·NA Series (OB451) MUY-A·NA, GA·NA Series (OB451) MXZ-A·NA Series (OB444) CONTENTS MSZ-A09/12/15/17NA MSY-A15/17NA NOTE: RoHS compliant products have <G> mark on the spec name plate. For servicing of RoHS compliant products, refer to the PARTS LIST (RoHS compliant). 1. TECHNICAL CHANGES ··································· 3 2. PART NAMES AND FUNCTIONS ····················· 4 3. SPECIFICATION ················································ 5 4. OUTLINES AND DIMENSIONS ························ 7 5. WIRING DIAGRAM············································ 8 6. REFRIGERANT SYSTEM DIAGRAM ··············· 9 7. SERVICE FUNCTIONS ··································· 10 8. TROUBLESHOOTING ······································11 9. DISASSEMBLY INSTRUCTIONS···················· 25 10. PARTS LIST····················································· 30 10-1. PARTS LIST ············································ 30 10-2. RoHS PARTS LIST ································· 36 11. MICROPROCESSOR CONTROL ···················· 42 Revision A: • PARTS LIST has been revised. (10-1.8, 10-2.8) Revision B: • MSZ-A•NA- 1 and MSY-A•NA- 1 Remote controller has been changed. Revision C: • SPECIFICATION has been corrected. Powerful has been added. (Airflow , Sound level) Revision D: • MSZ-GA•NA and MSY-GA•NA have been added. 2 1 TECHNICAL CHANGES MSZ09UN MSZ12UN MSH15TN MSH17TN → → → → MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSH24WN → MSZ-A24NA MS15TN → MSY-A15NA MS17TN → MSY-A17NA MS24WN → MSY-A24NA 1. Control method between indoor and outdoor has been changed. 2. Indoor fan motor has been changed. 3. Signal of remote controller has been changed. (It is not available for conventional models.) MSZ-A09NA → MSZ-A12NA → MSZ-A15NA → MSZ-A17NA → MSZ-A09NAMSZ-A12NAMSZ-A15NAMSZ-A17NA- 1 1 1 1 MSZ-A24NA → MSY-A15NA → MSY-A17NA → MSY-A24NA → MSZ-A24NAMSY-A15NAMSY-A17NAMSY-A24NA- 1 1 1 1 1. Remote controller has been changed. • Temperature indication function (°F/°C) has been added. (Refer to 11-10.) Models MSZ-A09/12/15/17NA MSZ-A09/12/15/17NAMSZ-A24NA MSZ-A24NA - 1 MSY-A15/17NA MSY-A15/17NA - 1 MSY-A24NA MSY-A24NA - 1 1 Remote controller KM06A KM07J KM06B KM07K KM06C KM07L KM06D KM07M Temperature indication °F °F/°C °F °F/°C °F °F/°C °F °F/°C • Timer indication has been changed. (AM/PM indication) 2. Conduit plate has been removed. (MSZ-A09/12/15/17, MSY-A15/17) 3. Conduit cover, terminal block cover and terminal block holder have been changed. (MSZ-A09/12/15/17, MSY-A15/17) MSZ-A24NAMSY-A24NA- 1 1 → MSZ-GA24NA → MSY-GA24NA 1. Indoor electronic control P.C. board has been changed. 3 2 PART NAMES AND FUNCTIONS MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA Front panel MSZ-A17NA MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA Air inlet Heat exchanger Panel Air cleaning filter (Anti-Allergy Enzyme Filter, Blue bellows type) Catechin air filter Air outlet Vertical vane Remote controller Horizontal vane Line flow fan MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA Display section Operation section (When the front panel is opened) Operation Indicator lamp Emergency operation switch MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA Remote control receiving section Operation indicator lamp Emergency operation switch Remote control receiving section ACCESSORIES Installation plate Installation plate fixing screw 4 × 25 mm Remote controller holder Fixing screw for 3.5 × 1.6 mm (Black) Battery (AAA) for remote controller Wireless remote controller Felt tape (Used for left or left-rear piping) Conduit plate MSZ-A09/12/15/17NA MSY-A15/17NA 1 8 1 2 2 1 1 1 4 MSZ-A09/12/15/17NAMSY-A15/17NA- 1 1 5 1 2 2 1 1 – 1 MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA 1 7 1 2 2 1 1 – 3 SPECIFICATION Indoor unit model MSZ-A09NA MSZ-A12NA External finish White Power supply V, phase, Hz 208/230, 1, 60 Max.-fuse size (time delay) / Disconnect switch A 15 Min. circuit ampacity A 1.0 Fan motor Airflow Low–Med.–High–Powerful F.L.A COOL Dry (Wet) HEAT Moisture removal Sound level Low–Med.–High–Powerful CFM 0.76 152-229-307-338 (134-205-275-303) 159-222-307-321 pt./h COOL dB(A) HEAT Cond. drain connection O.D. 2.3 3.2 22-33-38-41 22-34-42-44 22-33-38-39 22-34-42-42 in. 5/8 W Dimensions 152-240-353-388 (134-215-318-349) 159-240-353-353 30-11/16 D in. 8-1/4 H 11-3/4 Weight Ib. 23 Remote controller Wireless type 12-24 VDC Control voltage (by built-in transformer) Indoor unit model MSZ-A15NA MSY-A15NA MSZ-A17NA External finish Power supply V, phase, Hz 208/230, 1, 60 Max.-fuse size (time delay) / Disconnect switch A 15 Min. circuit ampacity A 1.0 Fan motor Airflow Low–Med.–High–Powerful F.L.A COOL Dry (Wet) HEAT Moisture removal Sound level Low–Med.–High–Powerful CFM 0.76 268-328-381-419 (240-293-342-376) 254-314-381-381 pt./h COOL dB(A) HEAT Cond. drain connection O.D. — 254-314-381-381 4.7 34-40-45-47 34-38-44-44 34-40-46-48 — 34-38-44-44 in. 30-11/16 D in. 8-1/4 11-3/4 Weight Ib. 23 Remote controller Wireless type Control voltage (by built-in transformer) 12-24 VDC Indoor unit model MSZ-A24NA MSZ-GA24NA External finish MSY-A24NA V, phase, Hz 208/230, 1, 60 Max.-fuse size (time delay) / Disconnect switch A 15 Min. circuit ampacity A 1.0 Fan motor F.L.A COOL Dry (Wet) HEAT Moisture removal CFM 0.76 296-431-568-624 (265-385-508-558) 296-486-568-590 350-486-568-590 pt./h COOL HEAT Cond. drain connection O.D. 34-40-49-51 dB(A) 34-40-48-49 in. D — 5/8 43-5/16 in. 10-1/4 H Weight — 7.3 W Dimensions MSY-GA24NA White Power supply Sound level Low–Med.–High–Powerful — 5/8 H Airflow Low–Med.–High–Powerful — 5.2 W Dimensions MSY-A17NA White 12-13/16 Ib. 37 Remote controller Wireless type 12-24 VDC Control voltage (by built-in transformer) NOTE: Test conditions are based on ARI 210/240. Rating conditions (Cooling) — Indoor: 80˚FDB, 67˚FWB, Outdoor: 95˚FDB, (75˚FWB) Rated frequency (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 47˚FDB, 43˚FWB Rated frequency (Heating) — Indoor: 70˚FDB, 60˚FWB, Outdoor: 17˚FDB, 15˚FWB Maximum frequency 5 3-1. OPERATING RANGE (1) POWER SUPPLY Rated voltage Guaranteed Voltage (V) 208/230 V 1 phase 60 Hz Indoor unit Min.187 208 230 Max.253 (2) OPERATION Intake air temperature (°F) Mode Condition Indoor Standard temperature Maximum temperature Cooling Minimum temperature Maximum humidity Standard temperature Heating Maximum temperature Minimum temperature DB 80 90 67 Outdoor WB 67 73 57 DB 95 115 14 78% WB — — — — 70 80 60 67 70 60 47 75 14 5 (MUZ-GA24) 43 65 13 4 (MUZ-GA24) Except - U model 3-2. OUTLET AIR SPEED AND COVERAGE RANGE Model MSZ-A09NA MSZ-A15NA MSZ-A15NA MSY-A15NA MSZ-A17NA MSZ-A17NA MSY-A17NA MSZ-A24NA MSZ-GA24NA MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA Coverage range (ft.) 23.4 23.4 21.0 26.7 26.7 24.1 28.8 28.8 26.0 28.8 28.8 26.0 Dry 568 20.2 34.4 Dry 568 20.2 34.4 Wet 508 18.1 30.9 Function Air flow (CFM) HEAT Dry Dry Wet Dry Dry Wet Dry Dry Wet Dry Dry Wet COOL HEAT MSZ-A12NA 307 307 275 353 353 318 381 381 342 381 381 342 Air speed (ft./sec.) 16.8 16.8 15.1 19.3 19.3 17.4 20.9 20.9 18.8 20.9 20.9 18.8 Mode COOL HEAT COOL HEAT COOL HEAT COOL 6 ● The air coverage range is the figure up to the position where the air speed is 1 ft./sec., when air is blown out horizontally from the unit properly at the High speed position. The coverage range should be used only as a general guideline since it varies according to the size of the room and furniture arranged inside the room. 4 OUTLINES AND DIMENSIONS MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA Indoor unit 7/8 hole 7/8 6-1/8 2-3/16 6-1/8 1-3/4 12-5/8 13-3/16 2-3/4 Air in Wall hole ø2-9/16 8-1/4 2-1/8 24-9/16 3/16 4 Installation plate { 3/4 6-1/4 2-5/16 9/16 2-3/16 1/8 8-7/8 10-1/8 8-7/16 1-5/8 11-3/4 8-7/8 2-3/16 1-11/16 Installation plate and MSY-A•NA- are excluded.) 7/16x13/16 Oblong hole 8-7/16 9-3/16 10-3/4 11-5/16 Conduit plate(MSZ-A•NA7/16x1 Oblong hole 30-11/16 Unit: inch Liquid line ø1/4 19-11/16 Gas line ø3/8 16-15/16 Insulation ø1-3/8 O.D ø3/4 I.D Drain hose ø5/8 (Connected part O.D) Air out Insulation ø1-1/8 MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA Installation plate Indoor unit 3-7/8 3-7/8 16-5/16 16-5/16 6-13/16 1-7/8 43-5/16 1/8 1-7/8 10-1/16 5/16 6-13/16 12-3/8 42-1/16 12-13/16 Wall hole ø3 10-1/4 Air in 2-3/16 Installation plate { 9-15/16 Liquid line ø1/4 19-11/16 Gas line ø5/8 16-15/16 Insulation ø1-15/16 O.D ø1-1/4 I.D 3/4 6-1/4 2-5/16 31-1/8 3/16 Air out Drain hose ø5/8 (Connected part O.D) Insulation ø1-1/8 Wireless remote controller 7 5 WIRING DIAGRAM MSZ-A09NA MSY-A15NA MSZ-A12NA MSY-A17NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA 8 6 REFRIGERANT SYSTEM DIAGRAM MSZ-A09NA MSZ-A12NA MSZ-A15NA MSY-A15NA MSZ-A17NA MSY-A17NA Refrigerant pipe ø1/2 (with heat insulator) Refrigerant pipe ø3/8 (with heat insulator) Indoor heat exchanger Unit: inch Indoor coil thermistor RT12(main) Indoor heat exchanger Flared connection Indoor coil thermistor RT12(main) Distributor Flared connection Indoor coil thermistor RT13(sub) Indoor coil thermistor RT13(sub) Room temperature thermistor RT11 Room temperature thermistor RT11 Flared connection Flared connection Refrigerant pipe ø1/4 (with heat insulator) Refrigerant pipe ø1/4 (with heat insulator) MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA Refrigerant pipe ø5/8 (with heat insulator) Indoor heat exchanger Indoor coil thermistor RT12(main) Distributor Flared connection Indoor coil thermistor RT13(sub) Room temperature thermistor RT11 Flared connection Refrigerant flow in cooling Refrigerant pipe ø1/4 (with heat insulator) Refrigerant flow in heating 9 7 SERVICE FUNCTIONS MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY-A15NA MSY-A17NA MSY-A24NA MSZ-GA24NA MSY-GA24NA 7-1. TIMER SHORT MODE For service, set time can be shortened by short circuit of JPG and JPS on the indoor electronic control P.C. board. The time will be shortened as follows. (Refer to 8-7.) Set time: 1-minute → 1-second Set time: 3-minute → 3-second (It takes 3 minutes for the compressor to start operation. However, the starting time is shortened by short circuit-of JPG and JPS.) 7-2. P.C. BOARD MODIFICATION FOR INDIVIDUAL OPERATION A maximum of 4 indoor units with wireless remote controllers can be used in a room. In this case, to operate each indoor unit individually by each remote controller, P.C. boards of remote controller must be modified according to the number of the indoor unit. How to modify the remote controller P.C. board Remove batteries before modification. The board has a print as shown below: J1 NOTE: For modification, take out the batteries and press the OPERATE/STOP (ON/OFF) button twice or 3 times at first. After finish modification, put back the batteries then press the RESET button. J2 The P.C. board has the print “J1” and “J2”. Solder “J1” and “J2” according to the number of indoor unit as shown in Table 1. After modification, press the RESET button. Table 1 No. 1 unit No. 2 unit No. 3 unit No. 4 unit 1 unit operation No modification — — — 2 units operation Same as at left Solder J1 — — 3 units operation Same as at left Same as at left Solder J2 — 4 units operation Same as at left Same as at left Same as at left Solder both J1 and J2 How to set the remote controller exclusively for particular indoor unit After you turn the breaker ON, the first remote controller that sends the signal to the indoor unit will be regarded as the remote controller for the indoor unit. The indoor unit will only accept the signal from the remote controller that has been assigned to the indoor unit once they are set. The setting will be cancelled if the breaker has turned OFF, or the power supply has shut down. Please conduct the above setting once again after the power has restored. 10 7-3. AUTO RESTART FUNCTION When the indoor unit is controlled with the remote controller, the operation mode, the set temperature, and the fan speed are memorized by the indoor electronic control P.C. board. The “AUTO RESTART FUNCTION” sets to work the moment power has restored after power failure. Then, the unit will restart automatically. Operation If the main power has been cut, the operation settings remain. After the power is restored, the unit restarts automatically according to the memory. (However, it takes at least 3 minutes for the compressor to start running.) How to release “AUTO RESTART FUNCTION” Turn OFF the main power of the unit. Solder the Jumper wire JR07 on the indoor electronic control P.C. board. (Refer to 8-7.) MSZ-A09/12/15/17NA MSY-A15/17NA BZ JR07 BZ CN101 CN151 JR07 CN112 CN152 CN151 CN112 CN211 CN211 MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA NOTE: • The operation settings are memorized when 10 seconds have passed after the indoor unit was operated with the remote controller. • If main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is cancelled. • If the unit has been OFF with the remote controller before power failure, the auto restart function does not work as the power button of the remote controller is OFF. • To prevent breaker OFF due to the rush of starting current, systematize other home appliance not to turn ON at the same time. • When some air conditioners are connected to the same supply system, if they are operated before power failure, the starting current of all the compressors may flow simultaneously at restart. Therefore, the special counter-measures are required to prevent the main voltage-drop or the rush of the starting current by adding to the system that allows the units to start one by one. 8 TROUBLESHOOTING MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY-A15NA MSY-A17NA MSY-A24NA MSZ-GA24NA MSY-GA24NA 8-1. CAUTIONS ON TROUBLESHOOTING 1. Before troubleshooting, check the following 1) Check the power supply voltage. 2) Check the indoor/outdoor connecting wire for miswiring. 2. Take care of the following during servicing 1) Before servicing the air conditioner, be sure to turn OFF the unit first with the remote controller, and then after confirming the horizontal vane is closed, turn OFF the breaker and/or disconnect the power plug. 2) Be sure to turn OFF the power supply before removing the front panel, the cabinet, the top panel, and the electronic control P.C. board. 3) When removing the electronic control P.C. board, hold the edge of the board with care NOT to apply stress on the components. 4) When connecting or disconnecting the connectors, hold the housing of the connector. DO NOT pull the lead wires. Lead wiring Housing point 11 3. Troubleshooting procedure 1) First, check if the OPERATION INDICATOR lamp on the indoor unit is flashing ON and OFF to indicate an abnormality. To make sure, check how many times the abnormality indication is flashing ON and OFF before starting service work. 2) Before servicing check that the connector and terminal are connected properly. 3) When the electronic control P.C. board seems to be defective, check the copper foil pattern for disconnection and the components for bursting and discoloration. 4) When troubleshooting, refer to 8-2., 8-3. and 8-4. 4. How to replace batteries Weak batteries may cause the remote controller malfunction. In this case, replace the batteries to operate the remote controller normally. Press RESET button with tip end of ball point pen or the like, and then use the remote controller. Remove the front lid and insert batteries. Then reattach the front lid. Insert the negative pole of the batteries first. Check if the polarity of the batteries is correct. RESET button NOTE: 1. If RESET button is not pressed, the remote controller may not operate correctly. 2. This remote controller has a circuit to automatically reset the microprocessor control when batteries are replaced. This function is equipped to prevent the microprocessor control from malfunctioning due to the voltage drop caused by the battery replacement. INFORMATION FOR MULTI SYSTEM AIR CONDITIONER OUTDOOR UNIT: MXZ series Multi system air conditioner can connect two or more indoor units with one outdoor unit. • When you try to operate two or more indoor units with one outdoor unit simultaneously, one for the cooling and the other for heating, the operation mode of the indoor unit that operates earlier is selected. Other indoor units cannot operate, and operation indicator lamp flashes as shown in the figure below. In this case, please set all the indoor units to the same operation mode. OPERATION INDICATOR Lighted Blinking Not lighted • When indoor unit starts the operation while the defrosting of outdoor unit is being done, it takes a few minutes (max. 10 minutes) to blow out the warm air. • In the heating operation, though indoor unit that does not operate may get warm or the sound of refrigerant flowing may be heard, they are not malfunction. The reason is that the refrigerant continuously flows into it. 12 8-2. FAILURE MODE RECALL FUNCTION Outline of the function This air conditioner can memorize the abnormal condition which has occurred once. Even though LED indication listed on the troubleshooting check table (8-4.) disappears, the memorized failure details can be recalled. 1. Flow chart of failure mode recall function for the indoor/outdoor unit Those figures show about MSZ-A09/12/15/17. Operational procedure The cause of abnormality cannot be found because the abnormality does not recur. Setting up the failure mode recall function Turn ON the power supply. <Preparation of the remote controller> While pressing both OPERATION SELECT button and TOO COOL button on the remote controller at the same time, press RESET button. First, release RESET button. And release the other two buttons after all LCD in operation display section of the remote controller is displayed after 3 seconds. Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. 1 1. Regardless of normal or abnormal condition, a short beep is emitted once the signal is received. Does the left lamp of OPERATION INDICATOR lamp on the indoor unit blink at the interval of 0.5 seconds? Blinks: Either indoor or outdoor unit is abnormal. Beep is emitted at the same timing as the blinking of the left lamp of OPERATION INDICATOR lamp. 2 Judgment of indoor/outdoor abnormality No (OFF) Indoor unit is normal. But the outdoor unit might be abnormal because there are some abnormalities that cannot be recalled with this way. Confirm if outdoor unit is abnormal according to the detailed outdoor unit failure mode recall function. Yes (Blinks) Before blinking, does the left lamp of OPERATION INDICATOR lamp stay ON for 3 seconds? Stays ON for 3 seconds (without beep): The outdoor unit is abnormal. No Yes The indoor unit is abnormal. Check the blinking pattern, and confirm the abnormal point with the indoor unit failure mode table. (8-2.2.) Make sure to check at least two consecutive blinking cycles. 2 The outdoor unit is abnormal. Check the blinking pattern, and confirm the abnormal point with the outdoor unit failure mode table. (Refer to outdoor unit service manual.) Make sure to check at least two consecutive blinking cycles. 3 Releasing the failure mode recall function Release the failure mode recall function by the following procedures. Turn OFF the power supply and turn it ON again. Press RESET button of the remote controller. Repair the defective parts. Deleting the memorized abnormal condition After repairing the unit, recall the failure mode again according to "Setting up the failure mode recall function" mentioned above. Press OPERATE/STOP (ON/OFF) button of the remote controller (the set temperature is displayed) with the remote controller headed towards the indoor unit. Press EMERGENCY OPERATION switch so that the memorized abnormal condition is deleted. Release the failure mode recall function according to "Releasing the failure mode recall function" mentioned above. NOTE: 1. Make sure to release the failure mode recall function once it's set up, otherwise the unit cannot operate properly. 2. If the abnormal condition is not deleted from the memory, the last abnormal condition is kept memorized. 2. Blinking pattern when the indoor unit is abnormal: Blinking at 0.52.5-second OFF second interval Blinking at 0.52.5-second OFF second interval ON OFF Beeps Repeated cycle Beeps Repeated cycle 3.Blinking pattern when the outdoor unit is abnormal: Blinking at 0.52.5-second OFF 3-second ON second interval 2.5-second OFF Beeps Repeated cycle 3-second ON Blinking at 0.5second interval ON OFF No beep Repeated cycle Beeps No beep Repeated cycle 13 Beeps Repeated cycle 2. Indoor unit failure mode table Left lamp of OPERATION Abnormal point INDICATOR lamp (Failure mode) Not lighted Normal Condition Correspondence — The room temperature thermistor short or 1-time flash every Room temperature open circuit is detected every 8 seconds dur0.5-second thermistor ing operation. Indoor coil 2-time flash The indoor coil thermistor short or open circuit 2.5-second OFF is detected every 8 seconds during operation. thermistor 3-time flash The serial signal from outdoor unit is not reSerial signal 2.5-second OFF ceived for a maximum of 6 minutes. The rotational frequency feedback signal is not 11-time flash Indoor fan motor emitted during the 12 seconds the indoor fan 2.5-second OFF operation. It cannot properly read data in the nonvolatile 12-time flash Indoor control memory of the indoor electronic control P.C. 2.5-second OFF system board. — Refer to the characteristics of the room temperature thermistor (8-7.). Refer to the characteristics of the main indoor coil thermistor, the sub indoor coil thermistor (8-7.). Refer to 8-6. "How to check miswiring and serial signal error". Refer to 8-6. "Check of indoor fan motor". Replace the indoor electronic control P.C. board. NOTE: Blinking patterns of this mode differ from the ones of TROUBLESHOOTING CHECK TABLE (8-4.). 14 8-3. INSTRUCTION OF TROUBLESHOOTING Start Indoor unit operates. Outdoor unit does not operate. Indoor unit operates. Outdoor unit does not operate normally. Indoor unit does not receive the signal from remote controller. OPERATION INDICATOR lamp on the indoor unit is flashing ON and OFF. If blinking of OPERATION INDICATOR lamp cannot be checked, it can be checked with failure mode recall function. Outdoor unit operates only in Test Run operation. Outdoor unit does not operate even in Test Run operation. Unit does not operate normal operation in COOL or HEAT mode. Indoor unit operates, when EMERGENCY OPERATION switch is pressed. Indoor unit does not operate, when EMERGENCY OPERATION switch is pressed. Check room temperature thermistor. Refer to 8-7. "Test point diagram and voltage". Refer to "How to check inverter/compressor". Refer to "Check of R.V. coil". Refer to 8-6. "Check of remote controller and receiver P.C. board". 1. Check indoor/outdoor connecting wire. (Check if the power is supplied to the indoor unit.) 2. Refer to 8-6. "Check of indoor electronic control P.C. board and indoor fan motor". "Test Run operation" means the operation within 30 minutes after EMERGENCY OPERATION switch is pressed. Refer to outdoor unit service manual. Left lamp Flash on and OFF at 0.5-second intervals Cause: Indoor/Outdoor unit • Miswiring or trouble of serial signal Left lamp 2-time flash Cause: Indoor unit • Trouble of room temperature / indoor coil thermistor Left lamp 3-time flash Cause: Indoor unit • Trouble of indoor fan motor Left lamp 4-time flash Cause: Indoor unit • Trouble of indoor unit control system Left lamp 5-time flash Cause: Outdoor unit • Outdoor power system abnormality Left lamp 6-time flash Cause: Outdoor unit • Trouble of thermistor in outdoor unit Left lamp 7-time flash Cause: Outdoor unit • Trouble of outdoor control system Left lamp 14-time flash Cause: Outdoor unit • Other abnormality Refer to 8-6. "How to check miswiring and serial signal error". Check room Refer to 8-6. temperature "Check of thermistor indoor fan and indoor motor". coil thermistor. Refer to 8-7."Test point diagram and voltage". Replace the indoor electronic control P.C. board. Refer to "How to check inverter/compressor". Refer to "Check of outdoor thermistors". Replace the inverter P.C. board or the outdoor electronic control P.C. board. Check "Flow chart of the detailed outdoor unit failure mode recall function." 15 8-4. TROUBLESHOOTING CHECK TABLE Before taking measures, make sure that the symptom reappears for accurate troubleshooting. When the indoor unit has started operation and detected an abnormality of the following condition (the first detection after the power ON), the indoor fan motor turns OFF and OPERATION INDICATOR lamp flashes. OPERATION INDICATOR No. 1 Abnormal point Miswiring or serial signal Indoor coil thermistor 2 Room temperature thermistor Lighted Blinking Not lighted Operation indicator lamp Symptom Condition Left lamp flashes. 0.5-second ON The serial signal from the outdoor unit is not received for 6 minutes. 0.5-second OFF Left lamp flashes. 2-time flash Correspondence • Refer to 8-6. "How to check miswiring and serial signal error". The indoor coil or the room temperature thermistor is short or open circuit. • Refer to 8-7. the characteristics of indoor coil thermistor, and the room temperature thermistor. The rotational frequency feedback signal is not emitted during the indoor fan operation. • Refer to 8-6. "Check of indoor fan motor". It cannot properly read data in the nonvolatile memory of the indoor electronic control P.C. board. • Replace the indoor electronic control P.C. board. 2.5-second OFF Left lamp flashes. 3-time flash 3 Indoor fan motor 2.5-second OFF Left lamp flashes. 4-time flash 4 Indoor control system 2.5-second OFF 5 Outdoor power system Left lamp flashes. 5-time flash Indoor unit and outdoor unit do not operate. 2.5-second OFF • Refer to "How to check of inIt consecutively occurs 3 times that the comverter/compressor". pressor stops for overcurrent protection or Refer to outdoor unit service start-up failure protection within 1 minute after manual start-up. • Check the stop valve. Left lamp flashes. 6-time flash 6 Outdoor thermistors The outdoor thermistors short or open circuit during the compressor operation. • Refer to "Check of outdoor thermistor". Refer to outdoor unit service manual. It cannot properly read data in the nonvolatile memory of the inverter P.C. board or the outdoor electronic control P.C. board. • Replace the inverter P.C. board or the outdoor electronic control P.C. board. Refer to outdoor unit service manual. An abnormality other than above mentioned is detected. • Check the stop valve. • Confirm the abnormality in detail using the failure mode recall function for outdoor unit. It cannot properly read data in the nonvolatile memory of the inverter P.C. board or the outdoor electronic control P.C. board. • Check the blinking pattern of the LED on the inverter P.C. board or the outdoor electronic control P.C. board. 2.5-second OFF 7 Outdoor control system Left lamp flashes. 7-time flash 2.5-second OFF Left lamp flashes. 14-time flash 8 Other abnormality 2.5-second OFF 9 Outdoor control system MSZ-A09/12 /15/17 MSY-A15/17 Left lamp lights up Outdoor unit does not operate 16 OPERATION INDICATOR No. Abnormal point Operation indicator lamp Symptom Condition Correspondence Left lamp lights and lower lamp flashes. 1 MXZ type Operation mode setting The operation mode of the each indoor unit Outdoor unit is differently set to COOL (includes DRY) and • Unify the operation mode. operates but HEAT at the same time, the operation mode Refer to outdoor unit service indoor unit does of the indoor unit that has operated at first has manual. not operate. the priority. 2.5-second OFF 8-5. TROUBLE CRITERION OF MAIN PARTS MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY-A15NA MSY-A17NA MSY-A24NA MSZ-GA24NA MSY-GA24NA Part name Room temperature thermistor(RT11) Check method and criterion Figure Measure the resistance with a tester. Refer to 8-7. "Test point diagram and voltage", Indoor coil thermistor "Indoor electronic control P.C. board", for the chart of thermistor.. (RT12(MAIN),RT13(SUB)) Indoor fan motor(MF) Horizontal vane motor(MV) MSZ-A09/12/15/17NA MSY-A15/17NA Horizontal vane motor(MV1) Vertical vane motor(MV2) A24NA, GA24NA Check 8-6. . Measure the resistance between the terminals with a tester. (Part temperature 50 ~ 86°F) Color of the lead wire Normal BRN-other one 235 ~ 255 Ω RED ROTOR YLW BRN ORN Measure the resistance between the terminals with a tester. (Part temperature 50 ~ 86°F) Color of the lead wire Normal BRN-other one 282 ~ 306 Ω RED ROTOR YLW BRN ORN 17 GRN GRN 8-6. TROUBLESHOOTING FLOW A Check of indoor fan motor The indoor fan motor error has occurred, and the indoor fan does not operate. Turn OFF the power supply. Pay careful attention to the high voltage on the fan motor connector CN211. Is there any foreign matter that interferes the rotation of the line flow fan? Turn ON the power supply, wait 5 seconds or more, and then press EMERGENCY OPERATION switch. Measure the supply voltage as follows within 12 seconds after EMERGENCY OPERATION switch is pressed. If more than 12 seconds passes by, turn OFF the power supply and turn ON it again, then measure the voltage. 1. Measure the voltage between CN211 (+) and (-). 2. Measure the voltage between CN211 (+) and (-). No Yes If more than 12 seconds passes after EMERGENCY OPERATION switch is pressed, the voltage mentioned above 2 goes 0 VDC although the indoor electronic control P.C. board is normal Remove the foreign matter and adjust the line flow fan. Is there 294/325 VDC between CN211 (+) and (-), and does the voltage between CN211 (+) and (-) rise to the range of 3 to 6 VDC within 12 seconds after EMERGENCY OPERATION switch is pressed? CN211 Yes Replace the indoor fan motor. Indoor electronic control P.C. board No Replace the indoor electronic control P.C. board. The indoor fan motor error has occurred, and the indoor fan repeats "12-second ON and 30-second OFF" 3 times, and then stops. Measure the voltage between CN211 (+) and (-) while the fan motor is rotating. Is it unchanged holding 0 or 15 VDC? Yes (Unchanged) Replace the indoor fan motor. 18 No (Changed) Replace the indoor electronic control P.C. board. B Check of remote controller and indoor electronic control P.C. board Check if the remote controller is exclusive for this air conditioner. Press OPERATE/STOP (ON/OFF) button on the remote controller. Is LCD display on the remote controller visible? Yes No (Not clear) Replace the batteries. (Refer to 8-1.4.) Remove the batteries, then set them back and press RESET button. (Refer to 8-1.4.) Check if the unit operates with the remote controller. Does the unit operate with the remote controller? No Turn ON a radio to AM and press OPERATE/STOP (ON/OFF) button on the remote controller. Yes Is noise heard from radio? OK No Replace the remote controller. Yes Are there any fluorescent lights of inverter or rapid-start type within the range of 3.28 ft.? No MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA Yes • Reinstall the unit away from lights. • Attach a filter on receiving part. MSZ-A09/12/15/17NA MSY-A15/17NA Measure the voltage between receiver P.C. board connector CN301 No.2(+) and No.3(-) when the remote controller button is pressed. Is the voltage approx. 4 VDC? Replace the indoor electronic control P.C. board. Yes No (5 or 0 VDC) Replace the receiver P.C. board. 19 C Check of indoor electronic control P.C. board and indoor fan motor Turn OFF the power supply. Remove indoor fan motor connector CN211 and vane motor connector CN151 from the indoor electronic control P.C. board and turn ON the power supply. Does the unit operate with the remote controller? Does OPERATION INDICATOR lamp light up by pressing EMERGENCY OPERATION switch? No Measure the resistance between CN211 and of the indoor fan motor connector. Short/open circuit: Replace the indoor fan motor. Measure the resistance of the horizontal vane motor coil. (Refer to 8-5.) Short/open circuit: Replace the horizontal vane motor and the indoor electronic control P.C. board. Yes Replace the indoor electronic control P.C. board. Yes Are the varistor (NR11) burnt and the fuse (F11) blown? Turn OFF the power supply. Check both “parts side” and “pattern side” of the indoor electronic control P.C. board visually. No Be sure to check both the fuse and the varistor in any case. Is the fuse (F11) blown only? No Yes Measure the resistance between (+) and (-) of the indoor fan motor connector (to CN211 on the indoor electronic control P.C. board). 1, 2 Is the resistance 1 MΩ or more? Yes No 1. The fan motor connector's black. lead wire is red, whereas is 2. Connect "+" of the tester to fan motor connector's lead wire, and "-" to lead wire, otherwise the resistance cannot be measured properly. Replace indoor electronic control P.C. board and the indoor fan motor. Replace indoor electronic control P.C. board. Measure the resistance of resistor (R111) on the indoor electronic control P.C. board. Is the resistance approx. 4 Ω? No Replace the indoor electronic control P.C. board and the indoor fan motor. Yes Replace the indoor electronic control P.C. board. Indoor electronic control P.C.Board Varistor(NR11) Fuse(F11) CN211 20 D How to check miswiring and serial signal error Turn OFF the power supply. Is there rated voltage in the power supply? Check the power supply. No Yes Turn ON the power supply. Is there rated voltage between outdoor terminal block S1 and S2? Yes Check the wiring. No Press EMERGENCY OPERATION switch once. Does the left lamp of OPERATION INDICATOR lamp light up? <Confirmation of the power to the indoor unit> Yes No Is serial signal error indicated 6 minutes later? No Yes Is there any miswiring, poor contact, or wire disconnection of the indoor/outdoor connecting wire? Yes Correct them. No A Turn OFF the power supply. Check once more if the indoor/outdoor B connecting wire is not miswiring. Short-circuit outdoor terminal block S2 and S3. 1 1. Miswiring may damage indoor electronic control P.C. board during the operation. Be sure to confirm the wiring is correct before the operation starts. 3. Be sure to check this within 3 minutes after turning ON. After 3 minutes, LED blinks 6 times. Even when the inverter P.C. board or the outdoor electronic control P.C. board is normal, LED blinks 6 times after 3 minutes. (Except for outdoor unit of multi system type) Turn ON the power supply. Does the LED on the inverter P.C. board or the outdoor electronic control P.C. board repeat "3.6-second-OFF and 0.8-secondON quick blinking"? 3 Yes A • Turn OFF inverter-controlled lighting equipment. • Turn OFF the power supply and then turn ON again. • Press EMERGENCY OPERATION switch. Is serial signal error indicated 6 minutes later? Yes B • Reinstall either the unit or the light away from each other. • Attach a filter No on remote control receiving section of the indoor unit. Turn OFF the power supply. Remove the short-circuit between outdoor terminal block S2 and S3. Turn ON the power supply. Is there amplitude of 10 to 20 VDC between outdoor terminal block S2 and S3? <Confirmation of serial signal> Yes Is there rated voltage between indoor terminal block S1 and S2? <Confirmation of power voltage> Yes No (Lighted or not lighted) 2. Be careful to the residual voltage of smoothing capacitor. No Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, Yes intermediate connection, poor contact to the terminal block? No No Is there any error of the indoor/outdoor connecting wire, such as the damage of the wire, Yes intermediate connection, poor contact to the terminal block? No Replace the indoor electronic control P.C. board. Be sure to release the failure-mode recall function after checking. 21 Replace the inverter P.C. board or the outdoor electronic control P.C. board. 2 Replace the indoor/ outdoor connecting wire. Replace the indoor/ outdoor connecting wire. E Electromagnetic noise enters into TV sets or radios Is the unit grounded? No Ground the unit. Yes Is the distance between the antennas and the indoor unit within 9.91 ft., or is the distance between the antennas and the outdoor unit within 9.91 ft.? Yes Extend the distance between the antennas and the indoor unit, and/or the antennas and the outdoor unit. Yes Extend the distance between the TV sets and/or radios and the indoor unit, or the TV sets or radios and the outdoor unit. Yes Replace or repair the antenna. Replace or repair the coaxial cable. Yes Extend the distance between the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas. No Is the distance between the TV sets or radios and the indoor unit within 3.28 ft., or is the distance between the TV sets or radios and the outdoor unit within 9.91 ft.? No Are the antennas damaged? Is the coaxial cable damaged? Is there any poor contact in the antenna wiring? No Is the indoor/outdoor connecting wire of the air conditioner and the wiring of the antennas close? No Even if all of the above conditions are fulfilled, the electromagnetic noise may enter, depending on the electric field strength or the installation condition (combination of specific conditions such as antennas or wiring). Check the followings before asking for service. 1. Devices affected by the electromagnetic noise TV sets, radios (FM/AM broadcast, shortwave) 2. Channel, frequency, broadcast station affected by the electromagnetic noise 3. Channel, frequency, broadcast station unaffected by the electromagnetic noise 4. Layout of: indoor/outdoor unit of the air conditioner, indoor/outdoor wiring, grounding wire, antennas, wiring from antennas, receiver 5. Electric field intensity of the broadcast station affected by the electromagnetic noise 6. Presence or absence of amplifier such as booster 7. Operation condition of air conditioner when the electromagnetic noise enters in 1) Turn OFF the power supply once, and then turn ON the power supply. In this situation, check for the electromagnetic noise. 2) Within 3 minutes after turning ON the power supply, press OPERATE/STOP (ON/OFF) button on the remote controller for power ON, and check for the electromagnetic noise. 3) After a short time (3 minutes later after turning ON), the outdoor unit starts running. During operation, check for the electromagnetic noise. 4) Press OPERATE/STOP (ON/OFF) button on the remote controller for power OFF, when the outdoor unit stops but the indoor/outdoor communication still runs on. In this situation, check for the electromagnetic noise. 22 8-7. Test point diagram and voltage MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA Indoor electronic control P.C. board Power supply input 208/230 VAC } Varistor (NR11) Fuse (F11) 250 V 3.15 A Resistor (R111) Indoor fan motor (CN211) 294/325 VDC (-) Fiducial terminal of cathode side on measuring high-voltage DC 15 VDC (+)3-6 VDC (+)0 or 15 VDC Release of Auto restart function Solder the Jumper wire to JR07 (Refer to 7-3.) 5 VDC Indoor coil thermistor RT12(MAIN) RT13(SUB) (CN112) Horizontal vane motor(CN151) Room temperature thermistor (RT11) } Power monitor receiver P.C. board Timer short mode point JPG, JPS (Refer to 7-1.) 12 VDC Emergency operation switch Resistance (k ) Indoor coil thermistor [RT12 (MAIN), RT13 (SUB)] Room temperature thermistor (RT11) SW P.C. board Temperature (°F) 23 MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA Indoor electronic control P.C. board Resistor (R111) Varistor (NR11) Power supply input 208/230 VAC } Release of Auto restart function Solder the Jumper wire to JR07 (Refer to 7-3.) Fuse (F11) 250 V 3.15 A Indoor fan motor (CN211) 294/325 VDC (-) Fiducial terminal of cathode side on measuring high-voltage DC Display P.C. board 15 VDC (+)3-6 VDC (+)0 or 15 VDC 5 VDC Indoor coil thermistor RT12(MAIN) RT13(SUB) Horizontal vane motor (CN151) Room temperature thermistor (RT11) } 12 VDC Receiver P.C. board Timer short mode point JPG, JPS (Refer to 7-1.) Vertical vane motor (CN152) Indoor coil thermistor [RT12 (MAIN), RT13 (SUB)] Room temperature thermistor (RT11) Resistance (k ) SW P.C. board Temperature (°F) 24 9 DISASSEMBLY INSTRUCTIONS <"Terminal with locking mechanism" Detaching points> The terminal which has the locking mechanism can be detached as shown below. There are two types (refer to (1) and (2)) of the terminal with locking mechanism. The terminal without locking mechanism can be detached by pulling it out. Check the shape of the terminal before detaching. (1) Slide the sleeve and check if there is a locking lever or not. (2) The terminal with this connector has the locking mechanism. Sleeve Locking lever Slide the sleeve. Pull the terminal while pushing the locking lever. Hold the sleeve, and pull out the terminal slowly. Connector 9-1. MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA OPERATING PROCEDURE PHOTOS 1. Removing the panel Photo 1 (1) Remove the horizontal vane. (2) Remove the screw caps of the panel. Remove the screws. (Photo 1) (3) Hold the lower part of both ends on the panel and pull it slightly toward you, and then remove the panel by pushing it upward. Photo 3 Screws of the panel Horizontal vane Screw of the conduit cover Terminal block cover Photo 2 Conduit cover Terminal block cover Conduit cover MSZ-A09/12/15/17NA MSY-A15/17NA - Screw of the conduit cover 1 1 Conduit plate MSZ-A09/12/15/17NA MSY-A15/17NA 25 OPERATING PROCEDURE PHOTOS 2. Removing the electronic control P.C. board, the power monitor receiver P.C. board, SW P.C. board and the terminal block (1) Remove the horizontal vane, the panel (refer to 1.) and the corner box. (2) Remove the screw of the conduit cover, and conduit cover. (Photo 2 or Photo 3) (3) Remove the indoor/outdoor connecting wire. (4) Remove the switch holder from the electrical cover. (Photo 4) (5) Remove the screw of the electrical cover, and then the electrical cover. (Photo 4) (6) Remove the ground wire connected to the indoor electronic control P.C. board from the electrical box. (Photo 5) (7) Unhook the power monitor receiver P.C. board holder from the catch. (Photo 4) (8) Open the rear cover of the power monitor receiver P.C. board holder and pull out the power monitor receiver P.C. board. (9) Open the switch holder and pull out SW P.C. board. (10) Pull the electronic control P.C. board slightly toward you from the electrical box, and disconnect TAB3 and all the connectors on the electronic control P.C. board. (LD101 and LD105 are direct-mounted to the electronic control P.C. board.) (11) Pull out the electronic control P.C. board from the electrical box. (12) Remove the ground wire connected to the heat exchanger from the electrical box. (Photo 5) (13) Unhook the catches of the electrical box, and pull out the electrical box. (14) Remove the screw of the terminal block cover, and then remove the terminal block cover and the terminal block holder. (Photo 6) (15) Remove the terminal block by sliding it. Photo 4 Switch holder Screw of the electrical cover. Power monitor receiver P.C. board holder Photo 5 Indoor fan motor connector (CN211) Indoor coil thermistor connector (CN112) Vane motor connector (CN151) Photo 6 3. Removing the electrical box (1) Remove the horizontal vane, the panel (refer to 1.) and the corner box. (2) Remove the screw of Conduit cover, and then the indoor/ outdoor connecting wire. (Photo 2 or Photo 3) (3) Remove the switch holder and the electrical cover. (Photo 4) (4) Remove the ground wire connected to the heat exchanger from the electrical box. (Photo 5) (5) Disconnect the following connectors on the electronic control P.C. board: the fan motor connector <CN211>, the indoor coil thermistor connector <CN112>, the vane motor connector <CN151>. (Photo 5) (6) Unhook the catches of the electrical box, and pull out the electrical box. Screw 26 Ground wire OPERATING PROCEDURE PHOTOS 4. Removing the horizontal vane motor unit Photo 7 (1) Remove the horizontal vane, the panel (refer to 1.) and the corner box. (2) Remove the screws of the horizontal vane motor unit, and pull out the horizontal vane motor unit. (Photo 7) (3) Disconnect the connector from the horizontal vane motor unit. 5. Removing the indoor fan motor and the line flow fan (1) Remove the horizontal vane, the panel (refer to 1.) and the corner box. (2) Remove the switch holder and the electrical box. (Refer to 3.) (3) Remove the drain hose from the nozzle assembly, and remove the nozzle assembly. (4) Remove the screws fixing the motor bed. (Photo 8) (5) Loosen the screw fixing the line flow fan. (Photo 9) (6) Remove the motor bed together with fan motor and motor band. (7) Release the hooks of the motor band, and remove the motor band then pull out the indoor fan motor. (8) Remove the screws fixing the left side of the heat exchanger. (Photo 10) (9) Lift the heat exchanger, and pull out the line flow fan to the lower-left. Screws of the horizontal vane motor unit Photo 8 Screws of the motor bed Photo 9 Screw of the line flow fan Photo 10 Screws of the left side of the heat exchanger 27 Motor band 9-2. MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA OPERATING PROCEDURE PHOTOS 1. Removing the front panel (1) Remove the screw caps of the front panel. Remove the screws. (2) Pull the panel down to your side slightly and unhook the catches at the top. Photo 1 Front panel Corner box Screws 2. Removing the electronic control P.C. board, the receiver P.C. board and the display P.C. board (1) Remove the front panel. (Refer to 1.) (2) Remove the corner box (3) Remove the screw of the electrical cover. Remove the electrical cover and T.B. SW cover. (4) Remove the screw of the ground wire, which is soldermounted to the electronic control P.C. board. (5) Remove the R.L holder. (6) Remove the screw of the conduit cover. (7) Remove the conduit cover. (8) While pulling the electronic control P.C. board forward little by little, disconnect all the connectors from the board. (9) Remove the electronic control P.C. board. (10) Open the R.L holder, remove the receiver P.C. board and the display P.C. board. Photo 2 Screw of the ground wire Indoor electronic control P.C. board T.B. SW cover Screw of T.B. SW cover Screw of the electrical cover Conduit cover R.L holder 3. Removing the electrical box (1) Remove the front panel. (Refer to 1.) (2) Remove the electrical cover. (Refer to 2.) (3) Disconnect the connector of the indoor coil thermistors. (4) Disconnect the indoor fan motor connector (CN211) and the vane motor connector (CN151 and CN152) on the electronic control P.C. board. (5) Remove the screw of ground wire to the heat exchanger. (6) Remove the fan motor lead wire and indoor coil thermistor from the electrical box. (7) Remove the lead wire of vane motor from the bottom of electrical box. (8) Remove the screw fixing the electrical box and remove the electrical box. 28 Photo 3 Screw of conduit cover Receiver P.C. board Screw of the ground wire Screw of the electrical box OPERATING PROCEDURE PHOTOS 4. Removing the vane motor Photo 4 (1) Remove the front panel. (Refer to 1.) (2) Remove the electrical cover. (Refer to 2.) Vane motors (3) Remove the lead wire of vane motor. (Refer to 3.) (4) Remove the R.L. holder. (5) Pull out the drain hose from the nozzle assembly and remove the nozzle assembly. (6) Remove the screws of the vane motor and disconnect the connector. (7) Remove the vane motor. Photo 5 Screws of the vane motor Vane motor 5. Removing the line flow fan and the indoor fan motor Photo 6 (1) Remove the front panel. (Refer to 1.) (2) Remove the electrical box. (Refer to 3.) (3) Remove the drain hose from the nozzle assembly and remove the nozzle assembly. (4) Remove the water cut. Screws fixing (5) Slide the hole cover and remove the hole cover. the left side (6) Remove the hexagon socket set screw from the line flow fan. of the heat (7) Remove the screws fixing the motor bed and remove the fan exchanger motor. (Be careful not to drop the fan motor because it is heavy.) (8) Remove the screws fixing the left side of the heat exchanger. (9) Lift the left side of the heat exchanger. Photo 7 (10) Remove the line flow fan. Water cut Photo 8 Hole cover Screws of the motor bed 29 Screws of the vane motor 10 PARTS LIST 10-1. PARTS LIST (non-RoHS compliant) MSZ-A09NA MSZ-A12NA MSY-A15NA MSY-A17NA MSZ-A15NA MSZ-A17NA 1. INDOOR UNIT STRUCTURAL PARTS 2. ACCESSORY AND REMOTE CONTROLLER 9 1 12 11 10 8 2 7 (See 10-1.5.) 3 4 5 6 1. INDOOR UNIT STRUCTURAL PARTS No. Part No. 1 2 3 4 5 6 7 8 9 10 E02 A32 234 E02 A49 000 E02 913 067 E02 915 010 E02 915 100 E02 916 100 — E02 A32 975 E02 913 970 E02 A49 978 Q'ty/unit Symbol MSZMSYin Wiring Remarks Diagram A09NA A12NA A15NA A17NA A15NA A17NA BOX 1 1 1 1 1 1 Including No.3,4 PANEL ASSEMBLY 1 1 1 1 1 1 SCREW CAP 2 2 2 2 2 2 2 PC/SET FRONT PANEL 1 1 1 1 1 1 CATECHIN AIR FILTER (LEFT) 1 1 1 1 1 1 CATECHIN AIR FILTER (RIGHT) 1 1 1 1 1 1 AIR CLEANING FILTER 1 1 1 1 1 1 MAC-415FT-E CORNER BOX (RIGHT) 1 1 1 1 1 1 INSTALLATION PLATE 1 1 1 1 1 1 CONDUIT PLATE 1 1 1 1 1 1 Part name 2. ACCESSORY AND REMOTE CONTROLLER E02 A54 426 REMOTE CONTROLLER E02 A49 426 CONTROLLER 12 E02 527 083 REMOTE HOLDER 1 11 1 30 1 1 1 1 1 1 1 1 1 1 KM06A KM06C MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 1 18 17 14 15 16 2 3 4 5 6 11 10 9 12 No. Part No. Part name 1 E02 751 509 2 E02 001 504 3 E02 897 702 E02 A54 235 4 E02 A56 235 BEARING MOUNT SLEEVE BEARING DRAIN HOSE 5 E02 897 303 VANE MOTOR UNIT (HORIZONTAL) HORIZONTAL VANE POWER MONITOR RECEIVER P.C. BOARD HOLDER CONDUIT COVER TERMINAL BLOCK COVER TERMINAL BLOCK HOLDER TERMINAL BLOCK 6 E02 913 040 7 E02 915 095 8 9 10 11 E02 A49 979 E02 A49 780 E02 A49 779 E02 913 375 E02 A54 452 E02 A55 452 E02 A56 452 12 E02 A57 452 E02 A51 452 E02 A52 452 13 E02 897 308 NOZZLE ASSEMBLY 8 7 12 13 Q'ty/unit Symbol MSZMSYin Wiring Diagram A09NA A12NA A15NA A17NA A15NA A17NA 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MV TB 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Remarks UP & DOWN 1 1 ELECTRONIC CONTROL P.C. BOARD 1 1 1 1 ROOM TEMPERATURE THERMISTOR RT11 1 1 E02 A54 307 1 1 RT12, INDOOR COIL THERMISTOR RT13 E02 A56 307 15 E02 915 782 SWITCH HOLDER 1 1 16 E02 A54 300 INDOOR FAN MOTOR 2 MF 1 1 17 E02 897 333 MOTOR BAND 1 1 18 E02 897 302 LINE FLOW FAN 1 1 1 Including SW P.C. BOARD and POWER MONITOR RECEIVER P.C. BOARD 2 Including FAN MOTOR RUBBER MOUNT (2 PC/SET) 14 31 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 RC0J30-□□ MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 4. INDOOR UNIT HEAT EXCHANGER 1 2 3 No. Part No. E02 A54 620 E02 A56 620 E02 815 666 2 E02 155 666 3 E02 151 667 1 Part name INDOOR HEAT EXCHANGER UNION (GAS) UNION (LIQUID) Q'ty/unit Symbol MSZMSYin Wiring Remarks Diagram A09NA A12NA A15NA A17NA A15NA A17NA 1 1 1 1 1 1 1 1 ø3/8 1 1 1 1 ø1/2 1 1 1 1 1 1 ø1/4 5. AIR CLEANING FILTER (ANTI-ALLERGY ENZYME FILTER) ● AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. ● Normal life of AIR CLEANING FILTER is 1 year. If AIR CLEANING FILTER is to be washed, soak AIR CLEANING FILTER in water (when showing dirt, in lukewarm water) and rinse it delicately, without removing the filter from the frame about once every 3 months. ● Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet. ● Do not remove or attach AIR CLEANING FILTER during unit operation. Model Part No. MSZ-A09/12/15/17NA MSY-A15/17NA MAC-415FT-E Replacement of the air cleaning filter (2) Remove the air cleaning filter (Blue bellows type) from the catechin air filter. (1) Remove the catechin air filter (left one). The air cleaning filter is not attached to the right side catechin air filter. Air cleaning filter (Blue bellows type) 32 MSZ-A24NA MSY-A24NA 7. INDOOR UNIT HEAT EXCHANGER 6. INDOOR UNIT STRUCTURAL PARTS 1 2 11 3 4 8 5 9 (See 10-1.10.) 12 13 6 7 6. INDOOR UNIT STRUCTURAL PARTS Part number that is circled is not shown in the illustration. Symbol No. Part No. Part Name in Wiring Diagram 1 E02 527 970 INSTALLATION PLATE 2 E02 685 234 BOX 3 E02 888 000 FRONT PANEL ASSEMBLY 4 E02 408 142 CATCH 5 E02 685 067 SCREW CAP 6 E02 888 010 GRILLE 7 E02 534 100 CATECHIN AIR FILTER 8 E02 685 975 CORNER BOX (RIGHT) 9 -— AIR CLEANING FILTER 10 E02 888 007 LAMP PANEL Q'ty/unit MSZ-A24NA MSY-A24NA 1 1 1 4 3 1 2 1 2 1 1 1 1 4 3 1 2 1 2 1 1 1 1 1 1 1 Remarks Including No.5,6 4 PC/SET 3 PC/SET 1 PC/SET MAC-2300FT 7. INDOOR UNIT HEAT EXCHANGER 11 E02 A58 620 INDOOR HEAT EXCHANGER 12 E02 527 666 UNION (GAS) 13 E02 151 667 UNION (LIQUID) 33 ø5/8 ø1/4 MSZ-A24NA MSY-A24NA 9. ACCESSORY AND REMOTE CONTROLLER 8. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 1 17 18 21 22 2 3 4 9 16 10 5 6 12 11 15 8 7 13 15 14 8. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS Part numbers that is circled is not shown in the illustration. No. Part No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Symbol in Wiring Diagram Part Name E02 527 302 E02 408 509 E02 001 504 E02 408 702 E02 A58 235 E02 685 040 E02 685 041 E02 527 034 E02 A58 300 E02 448 303 E02 408 303 E02 918 333 E02 918 329 E02 918 468 E02 A58 452 15 E02 A53 452 16 E02 527 308 17 E02 A58 375 LINE FLOW FAN BEARING MOUNT SLEEVE BEARING DRAIN HOSE NOZZLE VANE UPPER VANE LOWER VANE CRANK SET INDOOR FAN MOTOR ASSEMBLY 1 VANE MOTOR (VERTICAL) VANE MOTOR (HORIZONTAL) MOTOR BAND DISPLAY P.C. BOARD RECEIVER P.C. BOARD 18 E02 918 307 INDOOR COIL THERMISTOR 19 E02 528 034 20 E02 529 034 VANE MOTOR SUPPORT SET(RIGHT) VANE MOTOR SUPPORT SET(LEFT) MF MV2 MV1 ELECTRONIC CONTROL P.C. BOARD 2 ROOM TEMPERATURE THERMISTOR TERMINAL BLOCK RT11 TB RT12, RT13 Q'ty/unit MSZ-A24NA MSY-A24NA 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Remarks RC0J56-□□ RIGHT & LEFT UP & DOWN 1 Including FAN MOTOR RUBBER MOUNT 2 Including SW P.C. BOARD 9. ACCESSORY AND REMOTE CONTROLLER E02 A58 426 REMOTE CONTROLLER E02 A53 426 22 E02 527 083 REMOTE CONTROLLER HOLDER 21 1 1 34 1 1 KM06B KM06D 10. AIR CLEANING FILTER (ANTI-ALLERGY ENZYME FILTER) ● AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. ● Normal life of AIR CLEANING FILTER is 1 year. If AIR CLEANING FILTER is to be washed, soak AIR CLEANING FILTER in water (when showing dirt, in lukewarm water) and rinse it delicately, without removing the filter from the frame about once every 3 months. ● Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet. ● Do not remove or attach AIR CLEANING FILTER during unit operation. Model Part No. MSZ-A24NA MSY-A24NA MAC-2300FT Air cleaning filter (Anti-allergy enzyme filter:blue bellows type) 35 10-2. RoHS PARTS LIST (RoHS compliant) MSZ-A09NA MSZ-A12NA MSY-A15NA MSY-A17NA MSZ-A15NA MSZ-A17NA 2. ACCESSORY AND REMOTE CONTROLLER 1. INDOOR UNIT STRUCTURAL PARTS 9 1 10 12 11 8 2 7 (See 10-2.5.) 3 4 5 6 No. RoHS 1. INDOOR UNIT STRUCTURAL PARTS Part No. Part name 1 G E12 A32 234 BOX Symbol in Wiring 09NA Diagram - 1 1 1 Q'ty/unit MSZ-A 12NA 15NA 17NA - 1 - 1 - 1 1 1 1 1 1 1 MSY-A 15NA 17NA - 1 - 1 1 1 1 1 Remarks 2 G E12 A49 000 PANEL ASSEMBLY 1 1 1 1 1 1 1 1 1 1 1 3 G E12 913 067 4 G E12 915 010 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 Including No.3,4 2 2 PC/SET 1 5 G 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MAC-415FT-E 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 6 G 7 G 8 G 9 G 10 G SCREW CAP FRONT PANEL AIR FILTER E12 915 100 CATECHIN (LEFT) AIR FILTER E12 916 100 CATECHIN (RIGHT) AIR CLEANING — FILTER BOX E12 A32 975 CORNER (RIGHT) E12 913 970 INSTALLATION PLATE E12 A49 978 CONDUIT PLATE 1 2. ACCESSORY AND REMOTE CONTROLLER G G 11 G G E12 A54 426 E12 A49 426 REMOTE E12 C30 426 CONTROLLER E12 C22 426 REMOTE 12 G E12 527 083 CONTROLLER HOLDER 1 1 1 1 1 1 1 1 1 1 36 1 1 1 1 1 1 1 1 1 1 1 1 KM06A KM06C 1 KM07L KM07J 1 MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 3. INDOOR UNIT ELECTRICAL PARTS AND FUNCTIONAL PARTS 1 3 4 19 18 17 15 16 2 5 6 12 11 10 No. RoHS 12 Part No. 1 G E12 751 509 2 G E12 001 504 3 G E12 897 702 G E12 A54 235 4 G E12 A56 235 5 G E12 897 303 6 G E12 913 040 Part name BEARING MOUNT SLEEVE BEARING DRAIN HOSE NOZZLE ASSEMBLY VANE MOTOR UNIT (HORIZONTAL) HORIZONTAL VANE POWER MONITOR RECEIVER P.C. BOARD HOLDER CONDUIT COVER CONDUIT COVER TERMINAL BLOCK COVER TERMINAL BLOCK HOLDER TERMINAL BLOCK 7 8 9 14 1 1 1 1 Q'ty/unit MSZ-A 12NA 15NA 17NA - 1 - 1 - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Symbol in Wiring Diagram 09NA1 1 1 1 1 1 1 1 1 MV 13 1 1 8 G E12 A49 979 1 1 1 9 G E12 C30 979 1 1 1 G E12 A49 780 1 1 1 10 G E12 C30 780 1 1 1 G E12 A49 779 1 1 1 11 G E12 C30 779 1 1 1 12 G E12 913 375 TB 1 1 1 1 1 1 1 1 G E12 A54 452 G E12 A55 452 1 1 G E12 A56 452 ELECTRONIC 1 1 13 CONTROL P.C. G E12 A57 452 BOARD 1 G E12 A51 452 G E12 A52 452 1 1 1 1 1 1 14 G E12 897 308 ROOM TEMPERATURE THERMISTOR RT11 G E12 A54 307 INDOOR COIL 1 1 1 1 RT12, 15 RT13 G E12 A56 307 THERMISTOR 1 1 16 G E12 915 782 SWITCH HOLDER 1 1 1 1 1 1 MF 1 1 1 1 1 1 17 G E12 A54 300 INDOOR FAN MOTOR 2 18 G E12 897 333 MOTOR BAND 1 1 1 1 1 1 19 G E12 897 302 LINE FLOW FAN 1 1 1 1 1 1 1 Including SW P.C. BOARD and POWER MONITOR RECEIVER P.C. BOARD 2 Including FAN MOTOR RUBBER MOUNT (2 PC/SET) 1 7 G E12 915 095 37 1 1 1 MSY-A 15NA 17NA - 1 - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 UP & DOWN 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Remarks 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 RC0J30-□□ 1 1 MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSY-A15NA MSY-A17NA 4. INDOOR UNIT HEAT EXCHANGER 1 2 No. 1 2 3 RoHS 3 Part No. G G G G G E12 A54 620 E12 A56 620 E12 815 666 E12 155 666 E12 151 667 Part name Symbol in Wiring Diagram INDOOR HEAT EXCHANGER 09NA - 1 1 1 1 UNION (GAS) UNION (LIQUID) Q'ty/unit MSZ-A 12NA 15NA 17NA - 1 - 1 - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MSY-A 15NA 17NA - 1 - 1 1 1 1 1 1 1 1 1 1 1 1 1 Remarks ø3/8 ø1/2 ø1/4 5. AIR CLEANING FILTER (ANTI-ALLERGY ENZYME FILTER) ● AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. ● Normal life of AIR CLEANING FILTER is 1 year. If AIR CLEANING FILTER is to be washed, soak AIR CLEANING FILTER in water (when showing dirt, in lukewarm water) and rinse it delicately, without removing the filter from the frame about once every 3 months. ● Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet. ● Do not remove or attach AIR CLEANING FILTER during unit operation. Model Part No. MSZ-A09/12/15/17NA MSY-A15/17NA MAC-415FT-E Replacement of the air cleaning filter (2) Remove the air cleaning filter (Blue bellows type) from the catechin air filter. (1) Remove the catechin air filter (left one). The air cleaning filter is not attached to the right side catechin air filter. Air cleaning filter (Blue bellows type) 38 MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA 7. INDOOR UNIT HEAT EXCHANGER 6. INDOOR UNIT STRUCTURAL PARTS 1 2 11 3 4 8 5 9 (See 10-2.10.) 12 13 6 7 6. INDOOR UNIT STRUCTURAL PARTS No. RoHS Part number that is circled is not shown in the illustration. 1 2 3 4 5 6 7 8 9 10 G G G G G G G G G G Part No. E12 527 970 E12 685 234 E12 888 000 E12 408 142 E12 685 067 E12 888 010 E12 534 100 E12 685 975 — E12 888 007 Part Name Symbol in Wiring Diagram INSTALLATION PLATE BOX FRONT PANEL ASSEMBLY CATCH SCREW CAP GRILLE CATECHIN AIR FILTER CORNER BOX (RIGHT) AIR CLEANING FILTER LAMP PANEL Q'ty/unit MSZMSYRemarks A24NA GA24 A24NA GA24 NA NA - 1 - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Including No.5,6 4 4 4 4 4 4 4 PC/ SET 3 3 3 3 3 3 3 PC/ SET 1 1 1 1 1 1 2 2 2 2 2 2 1 PC/ SET 1 1 1 1 1 1 2 2 2 2 2 2 MAC-2300FT 1 1 1 1 1 1 7. INDOOR UNIT HEAT EXCHANGER 11 12 13 G G G E12 A58 620 INDOOR HEAT EXCHANGER E12 527 666 UNION (GAS) E12 151 667 UNION (LIQUID) 1 1 1 39 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 ø5/8 ø1/4 MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA 8. INDOOR UNIT FUNCTIONAL PARTS AND ELECTRICAL PARTS 18 1 2 17 3 4 9 16 10 5 6 12 11 15 8 7 13 14 15 No. RoHS Part numbers that are circled are not shown in the illustration. 1 2 3 4 5 6 7 8 G G G G G G G G 9 10 11 12 13 14 15 16 Part No. Part Name Symbol in Wiring Diagram E12 527 302 E12 408 509 E12 001 504 E12 408 702 E12 A58 235 E12 685 040 E12 685 041 E12 527 034 LINE FLOW FAN BEARING MOUNT SLEEVE BEARING DRAIN HOSE NOZZLE VANE UPPER VANE LOWER VANE CRANK SET FAN MOTOR G E12 A58 300 INDOOR MF ASSEMBLY 1 G E12 448 303 VANE MOTOR (VERTICAL) MV2 G E12 408 303 VANE MOTOR (HORIZONTAL) MV1 G E12 918 333 MOTOR BAND G E12 918 329 DISPLAY P.C. BOARD G E12 918 468 RECEIVER P.C. BOARD G E12 A58 452 G E12 A53 452 ELECTRONIC CONTROL P.C. G E12 E34 452 BOARD 2 G E12 E35 452 TEMPERATURE G E12 527 308 ROOM RT11 THERMISTOR G E12 A58 375 TERMINAL BLOCK TB G E12 918 307 INDOOR COIL THERMISTOR RT12, RT13 G E12 528 034 VANE MOTOR SUPPORT SET (RIGHT) G E12 529 034 VANE MOTOR SUPPORT SET (LEFT) 17 18 19 20 1 Including FAN MOTOR RUBBER MOUNT 2 Including SW P.C. BOARD 40 Q'ty/unit MSZMSYA24NA GA24 A24NA GA24 NA NA - 1 - 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Remarks 1 1 1 1 1 1 RC0J56-□□ 2 1 1 1 1 1 2 1 1 1 1 1 2 1 1 1 1 2 1 1 1 1 2 1 1 1 1 2 1 1 1 1 RIGHT & LEFT UP & DOWN 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA 9. ACCESSORY AND REMOTE CONTROLLER 2 No. 1 2 RoHS 1 G G G G G Part No. Symbol in Wiring Diagram Part Name E12 A58 426 E12 A53 426 REMOTE CONTROLLER E12 C26 426 E12 C29 426 E12 527 083 REMOTE CONTROLLER HOLDER Q'ty/unit MSZMSYRemarks A24NA GA24 A24NA GA24 NA NA - 1 - 1 1 KM06B 1 KM06D 1 1 KM07K 1 1 KM07M 1 1 1 1 1 1 10. AIR CLEANING FILTER (ANTI-ALLERGY ENZYME FILTER) ● AIR CLEANING FILTER removes fine dust of 0.01 micron from air by means of static electricity. ● Normal life of AIR CLEANING FILTER is 1 year. If AIR CLEANING FILTER is to be washed, soak AIR CLEANING FILTER in water (when showing dirt, in lukewarm water) and rinse it delicately, without removing the filter from the frame about once every 3 months. ● Clogged AIR CLEANING FILTER may reduce the air conditioner capacity or cause frost on the air outlet. ● Do not remove or attach AIR CLEANING FILTER during unit operation. Model Part No. MSZ-A24NA MSY-A24NA MSZ-GA24NA MSY-GA24NA MAC-2300FT Air cleaning filter (Anti-allergy enzyme filter:blue bellows type) 41 11 MICROPROCESSOR CONTROL MSZ-A09NA MSZ-A12NA MSZ-A15NA MSZ-A17NA MSZ-A24NA MSY-A15NA MSY-A17NA MSY-A24NA MSZ-GA24NA MSY-GA24NA WIRELESS REMOTE CONTROLLER These pictures show MSZ-A24. Signal transmitting section (This diagram shows an overall view.) Operation display section ON/OFF (operate/ stop) button VANE button (Horizontal vane button) Fan speed control button Temperature buttons Off-timer button Operation select button Indication of remote controller model is on back ECONO COOL button On-timer button WIDE VANE button (Vertical vane button) (MSZ-A24, MSY-A24) TIME set buttons Forward button Backward button POWERFUL button CLOCK set button RESET button NOTE Use the remote controller provided with the unit only. Do not use other remote controller. overall view.) view.) (This diagram shows an overall Once the operation mode is set, the same operation mode can be repeated by simply turning OPERATE/STOP (ON/OFF) button ON. Indoor unit receives the signal with a beep tone. When the system turns OFF, 3-minute time delay will operate to protect system from overload and compressor will not restart for 3 minutes. INDOOR UNIT DISPLAY SECTION Operation Indicator lamp The operation indicator at the right side of the indoor unit indicates the operation state. •The following indication applies regardless of shape of the indication. Indication Difference between target temperature and room temperature Operation state Lighted This shows that the air conditioner is operating to reach the target temperature. Please wait until the target temperature is obtained. Approx. 4°F or more This shows that the room temperature is approaching the target temperature. Approx. 4°F or less This shows a state of standby for operation. (For multi system air conditioner) 42 Blinking — Not lighted 11-1. COOL ( ) OPERATION (1) Press OPERATE/STOP (ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select COOL mode with OPERATION SELECT button. (3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature. The setting range is 61 ~ 88°F. 1. Coil frost prevention When the temperature of indoor heat exchanger becomes too low, the coil frost prevention mode works. The indoor fan operates at the set speed and the compressor stops. This mode continues until the temperature of indoor heat exchanger rises. 2. Low outside temperature operation When the outside temperature lowers during cool mode operation, low outside temperature operation starts, and the outdoor fan slows or stops. 11-2. DRY ( ) OPERATION (1) Press OPERATE/STOP (ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select DRY mode with OPERATION SELECT button. (3) The set temperature is determined from the initial room temperature. 1. Coil frost prevention Coil frost prevention is as same as COOL mode. (11-1.1.) 2. Low outside temperature operation Low outside temperature operation is as same as COOL mode. (11-1.2.) 11-3. HEAT ( ) OPERATION (MSZ) (1) Press OPERATE/STOP (ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select HEAT mode with OPERATION SELECT button. (3) Press TEMPERATURE buttons (TOO WARM or TOO COOL button) to select the desired temperature. The setting range is 61 ~ 88°F. 1. Cold air prevention control When the compressor is not operating or is starting, and the temperature of indoor heat exchanger and/or the room temperature is low or when defrosting is being done, the indoor fan will stop or rotate in Very Low speed. 2. High pressure protection In HEAT operation the compressor operational frequency is controlled by the temperature of the indoor heat exchanger to prevent the condensing pressure from increasing excessively. 3. Defrosting Defrosting starts when the temperature of outdoor heat exchanger becomes too low. The indoor/outdoor fans stop, the 4-way valve reverses, and the compressor starts. This mode continues until the temperature of outdoor heat exchanger rises or the fixed time passes. 11-4. FAN( )OPERATION (MSY) (1) Press OPERATE/STOP (ON/OFF) button. OPERATION INDICATOR lamp of the indoor unit turns ON with a beep tone. (2) Select FAN mode with OPERATION SELECT button. (3) Select the desired fan speed. When AUTO, it becomes Low. Only indoor fan operates. Outdoor unit does not operate. 11-5. “I FEEL CONTROL” ( ) OPERATION (MSY) (1) Press OPERATE/STOP (ON/OFF) button on the remote controller. OPERATION INDICATOR lamp of the indoor unit turns on with a beep tone. (2) Select “I FEEL CONTROL” mode with OPERATION SELECT button. (3) The operation mode is determined by the room temperature at start-up of the operation. • Once the mode is fixed, the mode does not change by room temperature afterwards. • Under the ON-TIMER ( ) operation, mode is determined according to the room temperature at the set time the operation starts. 43 (4) The initial set temperature is decided by the initial room temperature. Initial room temperature Model Initial set temperature 79°F or more 75°F COOL mode of "I FEEL CONTROL" 77 to 79°F Less than 77°F Initial room temperature minus 4°F DRY mode of "I FEEL CONTROL" Initial room temperature minus 4°F (5) TEMPERATURE buttons In “I FEEL CONTROL” ( ) mode, set temperature is decided by the microprocessor based on the room temperature. In addition, set temperature can be controlled by TOO WARM or TOO COOL buttons when you feel too cool or too warm. Each time the TOO WARM or TOO COOL button is pressed, the indoor unit receives the signal and emits a beep tone. • Fuzzy control When the TOO COOL or TOO WARM button is pressed, the microprocessor changes the set temperature, considering the room temperature, the frequency of pressing TOO COOL or TOO WARM button and the user’s preference to heat or cool. So this is called “Fuzzy control”, and works only in “I FEEL CONTROL” mode. In DRY mode of “I FEEL CONTROL”, the set temperature does not change. TOO COOL …To raise the set temperature 2~4°F TOO WARM …To lower the set temperature 2~4°F 11-6. AUTO CHANGE OVER ··· AUTO MODE OPERATION (MSZ) Once desired temperature is set, unit operation is switched automatically between COOL and HEAT operation. Mode selection (1) Initial mode When unit starts the operation with AUTO operation from OFF: • If the room temperature is higher than the set temperature, operation starts in COOL mode. • If the room temperature is equal to or lower than the set temperature, operation starts in HEAT mode. (2) Mode change COOL mode changes to HEAT mode when about 15 minutes have passed with the room temperature 2~4°F below the set temperature. HEAT mode changes to COOL mode when about 15 minutes have passed with the room temperature 2~4°F above the set temperature. NOTE: If two or more indoor units are operating in multi system, there might be a case that the indoor unit, which is operating in (AUTO), cannot change over to the other operating mode (COOL ↔ HEAT) and becomes a state of standby. Refer to 8-1. ”INFORMATION FOR MULTI SYSTEM AIR CONDITIONER”. 44 11-7. AUTO VANE OPERATION 1. Horizontal vane (1) Vane motor drive These models are equipped with a stepping motor for the horizontal vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approx. 12 V) transmitted from indoor microprocessor. (2) The horizontal vane angle and mode change as follows by pressing VANE CONTROL button. MSZ-A09/12/15/17 MSY-A15/17 MSZ-A24 MSY-A24 MSZ-GA24 MSY-GA24 (3) Positioning The vane is once pressed to the vane stopper to confirm the standard position and then set to the desired angle. Confirming of standard position is performed in the following cases. (a) When the operation starts or finishes (including timer operation). (b) When the test run starts. (c) When multi-standby starts or finishes. ) mode (4) VANE AUTO ( In VANE AUTO mode, the microprocessor automatically determines the vane angle and operation to make the optimum room-temperature distribution. (1) COOL and DRY operation Vane angle is fixed to Horizontal position or Angle 1. (2) HEAT operation (MSZ) Vane angle is fixed to Angle 4. Upward (5) STOP (operation OFF) and ON-TIMER standby In the following cases, the horizontal vane returns to the closed position. (a) When OPERATE/STOP (ON/OFF) button is pressed (POWER OFF). (b) When the operation is stopped by the emergency operation. (c) When ON-TIMER is ON standby. (6) Dew prevention During COOL or DRY operation with the vane angle at Angle 2 ~ 4 (A09 ~ 17) / Angle 3 ~ 5 (A24) / Angle 4 ~ 5 (GA24) when the compressor cumulative operation time exceeds 1 hour, the vane angle automatically changes to Angle 1 for dew prevention. (7) SWING MODE ( ) By selecting SWING mode with VANE CONTROL button, the horizontal vane swings vertically. The remote controller displays “ ”. (8) Cold air prevention in HEAT operation (MSZ) The horizontal vane position is set to Upward. NOTE: When 2 or more indoor units are operated with multi outdoor unit, even if any indoor unit turns thermostat OFF, this control does not work in the indoor unit. 45 (9) To change the airflow direction not to blow directly onto your body. (MSZ-A09/12/15/17, MSY-A15/17) HEAT (For MSZ) Pressing and holding Use this function if you do The air conditioner starts the The air conditioner starts heating VANE CONTROL button not want the air from the cooling or drying operation ap- operation approx. 3 minutes after the for 2 seconds or more, indoor unit to blow directly prox. 3 minutes after the vane vane has moved to the horizontal the horizontal vane onto your body. has moved to the horizontal position. reverses and moves • Depending on the shape position. • Sometimes the area around your horizontal position. of the room, the air may • When VANE CONTROL butfeet may not get warm. To warm blow directly onto your ton is pressed again, the vane the area around the feet, set the body. returns to the previously-set horizontal vane to (AUTO) or the position and the air conditioner downward-blowing position. • Press VANE CONTROL starts the cool or dry operation Horizontal • When VANE CONTROL button is button again to return the in approx. 3 minutes. position pressed again, the vane returns to vane to the previously-set the previously-set position and the position. air conditioner starts the heat operation in approx. 3 minutes. To change the airflow direction When to use this function? COOL/DRY NOTE: • If you make the airflow not to blow directly onto your body by pressing VANE CONTROL button, the compressor stops for 3 minutes even during the operation of the air conditioner. • The air conditioner operates with Very Low speed until the compressor turns on again. (10) ECONO COOL ( ) operation (ECONOmical operation) When ECONO COOL button is pressed in COOL mode, set temperature is automatically set 3.6°F higher than that in COOL mode. Also the horizontal vane swings in various cycle. SWING operation makes you feel cooler than set temperature. So, even though the set temperature is higher than that in COOL mode, the air conditioner can keep comfort. As a result, energy can be saved. ECONO COOL operation is cancelled when ECONO COOL button is pressed once again or VANE CONTROL button is pressed or change to other operation mode. (11) POWERFUL ( ) operation The air conditioner automatically adjusts the fan speed and the set temperature, and operates the POWERFUL mode. The POWERFUL mode is automatically released 15 minutes after operation starts, and the operation mode returns to the mode prior to POWERFUL operation. 2. Vertical vane (MSZ-A24, MSY-A24, MSZ-GA24, MSY-GA24) (1) Vane motor drive These models are equipped with a stepping motor for the vertical vane. The rotating direction, speed, and angle of the motor are controlled by pulse signals (approx. 12 V) transmitted from microprocessor. (2) The vertical vane angle and mode change as follows by pressing WIDE VANE button. 1 2 3 4 SWING 5 6 (3) Positioning The vane is once pressed to the vane stopper to confirm the standard position and then set to the desired angle. Confirming of standard position is performed in the following cases. (a) When OPERATE/STOP (ON/OFF) button is pressed (POWER ON/OFF). (b) When SWING is started or finished. (c) When the power supply turns ON. (4) SWING MODE ( ) By selecting SWING mode with WIDE VANE button, the vertical vane swings horizontally. The remote controller displays “ ”. 46 (5) WIDE MODE ( ) By selecting WIDE mode with WIDE VANE button, indoor fan speed becomes faster than setting fan speed on the remote controller ( ). The remote controller displays “ ”. NOTE: The position of vane angle 3, angle 4 and angle 5 are different in COOL operation and HEAT operation. Indoor fan speed becomes faster than setting fan speed on the remote controller even when or selected. is 11-8. TIMER OPERATION 1. How to set the time (1) Press OPERATE/STOP (ON/OFF) button to start the air conditioner. (2) Check that the current time is set correctly. NOTE: Timer operation will not work without setting the current time. Initially “0:00” blinks at the current time display of TIME MONITOR, so set the current time correctly with CLOCK SET button. How to set the current time (1) Press the CLOCK set button. (2) Press the TIME SET buttons ( and ) to set the current time. ) is press, the set time increases by 1 minute, and each time BACKWARD button ( • Each time FORWARD button ( ) is press, the set time decreases by 1 minute. • Pressing those buttons longer increases / decreases the set time by 10 minutes. Press the CLOCK set button. ON timer setting (1) Press ON-TIMER button( ) during operation. (2) Set the time of the timer using TIME SET buttons ( and ). OFF timer setting ) during operation. (1) Press OFF-TIMER button ( (2) Set the time of the timer using TIME SET buttons ( and ). Each time FORWARD button ( ) is pressed, the set time increases by 10 minutes: each time BACKWARD button ( ) is pressed, the set time decreases by 10 minutes. 2. Cancel To cancel ON timer, press ON-TIMER button ( ). To cancel OFF timer, press OFF-TIMER button( ). TIMER is cancelled and the display of set time disappears. PROGRAM TIMER • OFF timer and ON timer can be used in combination. The timer of the set time that is reached first will operate first. • “ ” and “ ” display shows the order of OFF timer and ON timer operation. (Example 1) The current time is 8:00 PM. The unit turns OFF at 11:00 PM, and ON at 6:00 AM. (Example 2) The current time is 11:00 AM. The unit turns ON at 5:00 PM, and OFF at 9:00 PM. NOTE: If the main power is turned OFF or a power failure occurs while AUTO START/STOP timer is active, the timer setting is cancelled. As these models are equipped with an auto restart function, the air conditioner starts operating with timer cancelled when power is restored. 47 11-9. EMERGENCY/TEST OPERATION In case of test run operation or emergency operation, use EMERGENCY OPERATION switch on the front of the indoor unit. Emergency operation is available when the remote controller is missing, has failed or the batteries of the remote controller run down. The unit will start and OPERATION INDICATOR lamp will light. The first 30 minutes of operation is the test run operation. This operation is for servicing. The Indoor fan speed runs at High speed and the system is in continuous operation (with thermostat ON). After 30 minutes of test run operation the system shifts to EMERGENCY COOL/HEAT MODE with a set temperature of 75°F. The fan speed shifts to Med. All protective operations such as the coil frost prevention works even in emergency operation. In the test run or emergency operation, the horizontal vane operates in VANE AUTO ( ) mode. Emergency operation continues until EMERGENCY OPERATION switch is pressed once or twice or the unit receives any signal from the remote controller. In case of latter normal operation will start. NOTE: Do not press EMERGENCY OPERATION switch during normal operation. E.O. SW EMERGENCY OPERATION switch Operation mode COOL Set temperature 75°F HEAT (MSZ) 75°F Fan speed Med. Med. Horizontal vane Auto Auto The operation mode is indicated by the Operation Indicator lamp as following MSZ type MSY type EMERGENCY COOL EMERGENCY COOL ↓ EMERGENCY HEAT ↓ STOP ↓ STOP Lighted Not lighted 11-10. Changing temperature indication (°F/°C) MSZ-A•NA- 1 MSY-A•NA- 1 MSZ-GA MSY-GA The preset unit is °F. Press RESET button while the temperature buttons are pressed. Press RESET button gently using a thin stick. HEAD OFFICE: TOKYO BLDG., 2-7-3, MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN © Copyright 2006 MITSUBISHI ELECTRIC CO.,LTD Distributed in Mar. 2009. No. OB450 REVISED EDITION-D 4 Distributed in Jun. 2008. No. OB450 REVISED EDITION-C 6 Distributed in May 2007. No. OB450 REVISED EDITION-B 7 Distributed in Dec. 2006. No. OB450 REVISED EDITION-A 7 Distributed in Apr. 2006. No. OB450 7 Made in Japan New publication, effective Mar. 2009 Specifications subject to change without notice.